The blueprints for the Eiffel Tower covered more than 14,000 square feet of drafting paper.
It would take more than 150 years to drive a car to the sun.
Little known, and even less appreciated, the United States actually has a mothers-in-law day.
If the Earth was smooth, the ocean would cover the entire surface to a depth of 12,000 feet.
At its peak in 1943, the Pentagon had a working population of about 33,000. Today about 23,000 employees work in the building.
On dry, windy days, pollen can travel up to 500 miles.
The Pentagon building in Arlington, Virginia, has nearly 68,000 miles of telephone lines.
